Ms Exposto told the Malaysian High Court she fell for an online romance scam masterminded by a "Captain Daniel Smith", who had identified himself as a US soldier based in Afghanistan.

Maria Elvira Pinto Exposto leaves her hearing at the Shah Alam High Court after being found not guilty. (AAP)

Defence lawyers said that she was lured into carrying a bag - which she believed contained only clothing - by "Smith", who asked her to take it to Melbourne from Shanghai.

The judge believed Ms Exposto's love for her online boyfriend was genuine and she was not aware there were any drugs in the bag.

Her lawyer, Muhammad Shafee Abdullah, said the judge was convinced of her innocence after hearing his client did not try to bypass searches at the airport.

"The judge described her as naive, not merely innocent but naive," he told reporters on Wednesday.

Ms Exposto is expected to remain in Malaysia for a number of months. (AAP)

"It was almost as though she asked for trouble as a trafficker," he said, noting she was not required to go through the checkpoints.

"But because she was not a trafficker - she was an innocent carrier tricked into carrying a bag - she did all these innocent things."

Co-lawyer, Farhan Shafee told AAP that expert testimony from Monica Whitty, cyberpsychologist from Warwick University in the UK, was key to the judge's finding.

Whitty gave evidence that the four stages of a cyber crime had been committed by scammers preying on Exposto.

The first stage is to find a lonely victim, secondly an ideal person is presented - in this case a US officer. The third stage is the grooming, which for Exposto was a two year online relationship.

The drugs found in Ms Exposto's possession. (9NEWS)

The final stage is to create a crisis, Shafee said. Exposto's online boyfriend was to be discharged from the military and urged her to fly to Shanghai to pick up his discharge papers - so they could marry - and deliver the papers to the US Embassy in Australia.

The papers were fake and she was asked to carry a bag, with drugs hidden in the lining.

He said that immediately after the verdict Exposto "was relieved and glad that justice found in her favour. She was more thrilled to be able to call her family in Australia."

The judge referred Exposto to the immigration department for deportation to Australia but she could remain in custody for months as she awaits the appeal against the not guilty verdict.